Precision two-phase electron oscillator employing an all-pass network having means for adjusting its time constant as a function of the amplitude of the oscillating voltage

摘要

A two-phase electronic oscillator comprises an integrator coupled in a loop with an all-pass network. The input resistor of the integrator is an incandescent lamp filament having a positive temperature coefficient of resistance, which adjusts the time constant of the integrator as a function of the amplitude of the oscillator voltages, thereby enforcing the condition for oscillation. The input and output voltages of the integrator are precisely in quadrature, and have precisely the same amplitude.